Form for concrete structures.



s. L HARRY aw. E. KELLY. .FORMFOR CONCRETE s'm'ucrunes. U1 APPucAnofl FIL'EDIJULY 29. |9|8l 598,941

2 SHEETS-SHEET 1 lmQnre o Limo u, film/Eff I Wax/J94 Patented A r. 1, 1919. I

3,1. HARRYYSL W. E. KELLY. FORM FOR CONCRETE STRUCTURES."

rmcmou m wluu 29. me. I

Patented Apr. 1, 1919.

2 SHEETS-SHEET 2 .UTEl) STATES rn'rniwr curios.

sent JAMES nanny Ann'wrumm EDWARD KELLY, or

- PENNSYLVANIA.

commmsvrnrn,

roam roe concurs s'rnucrunns.

Z '0 all whom it may concern."

Be it known that we, SAMUEL J. HARRY and WTLLIAM E. KELLY, citizens of the United States, residing at Connellsvllle, 1n

the county of Fayette and State of Pennsyl vania, have invented certain new and useful Improvements in Forms for Concrete Structures, of which the following is a specification.

This invention relates to molds and has special reference to a novel collapsible concrete form particularly adapted for use in the formation of tunnels, shafts, sewers, and

the like.

A primary object of the invention is to provide a mold wherein the several sect1ons 'may be readily secured together to form a complete circular unit, while certain of said sections are formed to cooperatewith a special locking key to provide a single, joint which enables the same to be readily reduced in diameter or collapsed, ito permit it to be easily withdrawn from t 1e completed concrete structure. I it is proposed to provide a construction wherein the adjoinin edges of the several matching sections 0- the [mold are constructed to he more or less permanently con nected as compared with the adjacent edge portions of one pair of sections, whereby one oint is providedin-the circumference o e mold which. may be readily and quickly released or broken to cause the entire unit to collapse or be reduced in districter sufiiciently to enable the entire unit to; be shifted as a whole to a new position without taking the individual sections apart.

Another. ohject of the invention is to provide a construction which involves improvenients in the, several arts or sections that are not only snscept. le ofexnbodlment m a manner toform a complete clrcular structure, but also structures ofrother desiredshapes, In other words; while thejrfeatures of improvement cur-bodied in the -.preserrt invan tion are particularly adaptable to a mold of. circular formation, these features are nevertheless susceptible i-of iopplication to znold sections which :when. t I provide an elliptical, square-o other shaped" ;embled will mold.

prim. further object of invention is to.

provide a structure of -1 e chowder s forth which is relatively simple in its con- Specification of Letters Patent.

That is to say,.

. the removal of the forms to anew. position.

A preferred and practical embodiment n Patented Apr. -1, 1919.

Application filed July 29, 1918. Serial No. 247,197.

of the invention is shown in the accom'panyin drawings, in which i igure 1 is an end elevation of a complete form-unit assembled in accordance with the present invention.

Fig. 2 is ,a detail perspective view of one I Fig. 5 is a detail elevation of the structure shown in. Fig. 3.

.Fig. 6 is a longitudinal section on the center line of the key bar of the lock-joint;

Similar reference characters designate corresponding parts throughout the several figures of'the drawings.

As previously! indicated, the present invention contemplates a concrete form of the circular'collapsible type which consists of a number of similar matching and readily interchangeable sections which may be readily connected in such amanner as to prov1de the complete form; Thus, by. reference to Figs. 1 and 2 of, the drawings it will be observed that the said several sec-[ tions are designated generally as S, and each preferably consistsof an outer sheet steel wall or shell plate 1 having secured to each ,end thereof asuitable segmental angle bar 9, which not only serves to reinforce and strengthen the end of the section, but also provides convenient means for coupling the end of one sectionto an adjacent section through the medium of suitable coupling bolts which may be inserted in the openin 3 especially provided for that purpose. s

shown, the ends of the angle bars 2 are mitered or cut away as at B to give sufiicient clearance to provide a relative hinging action between the coupled sections when c0l lapsingthe form and to also facilitate the complete dismemberment thereof. In addition'to the angle bar-reinforcement at each.

end of the section 1, the same is provided with an intermediate reinforclng angle bar 4 while the opposite side edges also have seunit.

cured thereto the angle bar strips 5-5j whose offset flanges 6 are adapted to abut with similar flanges of anadjacent section to provide the necessary lateral connection therebetween to make the complete mold Additional reinforcement is provided for the ends of each section S by a segmental gusset or chord'plate which is riveted or otherwise securedto the offset flange of the curved angle bars 2 bymeans of the fasten ings 8. Therefore,it will be apparent that there is a chord plate '7 at each end of thesection, and as will be observed from Fig. 2,

said plates carry on their inner faces the intermediate anchor plates 9, which are preferably of angular cross-section having one of their flanges riveted or otherwise secured to the chord plate as indicated'at 10, while the other flange thereof is provided with suitable openings 11 for receiving the fastening bolts 12 of a suitable interior cross-tie or brace 13 clearly shown in F igs.- 1 and 3 of the drawings. These ties 13 effectively brace the interior of the form by connecting the intermediate portion of ad acent sections, and by reason of the convenient means of attaching the ends thereof to the anchor plates 9, the said tie bars or braces may be readily put in place after the several sections are connected at their lateral edges, and also readily taken down prior to collapsing the entire mold structure, I

From the foregoing it will be apparent that the structural features and characteristics of the curved sections S which form a complete mold unit are such as ilOPlOVldB a strong and rigid structure which is not only capable of withstanding all the strains and pressures imposed thereon but is also easily handled by workmen. And, with the con.- struction shown and described it will be apparent that the several sections have a 'unifornrtype of connection. That is to say, the lateral edges of each section are capable of being coupled-to an adjoining section by means of suitable bolts or equivalent faste'nings, so that they will have a more or less fixed relation. However, owing to the desirability of providing a suitable place-in the ,mold which may be readily broken or.re-- leased, so that the entire mold may be collapsed or reduced in diameter substantially in the manner of a spiral, the ad oining side edges of one pair of sections are especially formed to cooperate with a novel type of,

locking bar JOlnl. I

Therefore, a primary novel and dlstinctive to provide a readily releasable feature of the present invention resides in the provision of a special quick detachable ,jointbetween certainof the sections which;

I greatly facilitates thehandling of the mold as a unit since it does away-,With the time consuming practice of disconnecting the in dividual sections thereof, and then again set-- ting them up and restablishing the connections therebetiveen in a new location. That is .to say, by leaving all of the sections connected except at one point, it becomes very easy to break the special lock joint provided by the present invention so as to permit the disconnected ends of the joint to overlap owing to the clearance B between the sec tions S andthe slight inherent flexibility of drawings that-the adjacent sectionsS and S are provided with reinforcing strips or bars at each side edge thereof, but one of these bars on the sections referred to slightly difffers from the others to provide the special I joint. That is to say, it will be observed that while the section S-is provided adjacent one edge with an anglestrip or bar 5 of the type previously described, its opposite edge is provided with an angle bar 14 whose ofi'set fiange 15 .is bent backwardly toward the other flange so'that wheh the opposite section S- havlngsa similar bar or strip l-l thereon is in juxtaposition thereto a substantially trough shaped cavity or keeper recess will be provided by the divergently related flanges 15-15. At each end of the [members lat and 14* the sections S and S" are provided with suitable clamping members 16 and 17 in the form of angle brackets which are arranged in opposite relation,'and are riveted respectively to the adjacent side edges of the adjoining sections S and S of the form. These clamping me nbers 16 and 17 are reinforced and strengthened by suitable bracing angles 18 and 19, and the outer ends thereof are provided with openings to receive a suitable transverse clamping bolt 20 for the purpose of holding the head 21 of a special locking key in position. This key essentially consists of the clamping head portion 21 of open triangular shape and a filler bar portion 22 which is adapted to extend the full length of the sectionsv in the valley ,betwfeenthe divergent flanges 15 and 15 of the angles 14 and 14, and support the projecting edge portions a of the sections S and 8' throughout the length of the unit, thus completely closing or sealing the joint theresists dia -plurality of duplicate sections, the

majority-oi" which are readily interchange y able and are held together at their meeting edges by suitable detachable fastenings 1 throughout the greater part of the circum-I between. The novel shape of the head par-c tiongl of'the keypennits of a wedging fit between the clamping members16 and 17 whichlike the flanges and 15"are divergently related, whereby, when the bolt 21 1s in position bchind'the fiatside of the head,

-the entire barisheld rigidlyin position,

" From thefforegoing it I will be apparent thattheapresentinvention aims to provide a form foriconcrete- Structures which conference of the mold, but at one pointin said pable of being secured together to form a circumference there is provided a special joint which permits of: releasingthe'meet ing edges of one pair ofsections in a man-1 ner which is much quicker than removing all of the belts or like fastenings betweenz the other connected sections, namely by. ,means of the novel locking key aboye de",

scribed. That is to say, the inventiongai ns to provide a plurality of individual-sections.

having novel reinforcements-which are ca complete circular or like unit, and are'also provided with suitable means for interiorly' ancejfor the'phrposeindicatedi 3 stiructiires consisting-ofa, pluralityof to bracing the unit, such for instance as the cross ties 13 'which ofier little :or no oblaitrnction to the passage of workmen orapparatus through the interior of the form. -Oliviously the, general open formation ofthe structures and its-simple and efiective systern .of reinforcement and bracing renders the handling-of theindividual sections putting up, taking down or shifting a com Iparatively easy}; ta'sk,;- and .while this is greatly facilitated byithe provision of the v novel joint and locking key. between one pair of sections; itis also facilitated as between the remaining sections because of the fact that the same aresheared. or cut away.

as. indicated at B to provide necessary clear- :,We..claim:"' k A"; collapsible -form unit for concrete matching and interchangeable'sections each section having means at both ends and sides for abutting with similar sections, fasteningsvfor connectingthe lateral-edges "of the sections to for'm'i' 'the' u nit, and a single readily releasable lock joint formedbetween' the lateral edges of one pair of said sections to facilitate the-collapse of the unit,

, v ing ofannit comprising a plurality of sections-having means at their edgesfor con necting with adj acent sect ons, and'a-readlly I releasable-lock joint between the .;lateral edges of a. pair of :said sectional said joint consistingof ipgcett abutments caarriedtlby. sai $01Q11 the dja e t asser on o [connecting with similar pc i y and a keybar adapted to be wedged there against.

3. A collapsible form for molds. comprising a plurality of similar form sections having a jointed connection at their edges permitting inward contraction of the entire series of sections, and a'releasable lock joint constitutlng the sole connection between a pairofsections, and including a single key bar and means for holding the key bar-m engagement-with the edges of the sections.

.tij'ons having means at their side edges for cent sections and a read clamped between said keeper bars.

$5, A -forin for concrete structures-goonisi stin'g 'of a unit comprising a plurality of sections having means at theinside edges 4. Af o1mfor-concrete structures consistmg o faunit comprising aplurality of mofor connecting with similar portions of ad-' jacent'sections, and a readily releasahlelock joint between a p ir of said sections, said joint {consisting o keeper bars carried by *the edge portion of sardiindjate'nt sections,

1 clamping arms at'eachend ofsaidkeefier 'fier ing of :bars, and a locking key eonsis -body adapted to occupy the space betweenthe keeper bars "and-"itclamping headat Q'eachend thereof adapted to fit between the c aid lamping arms, and a clampingbolt arranged in the iree 'ends'of the clamping arms and adapted 'to cause the same to rigidly grip the head of the key "bar to hold the same. against the adjacent intermediate edges'ofthe adjoinin sections. 1

16. Aicollapsibletu ular form for mblds consisting of a plurality of sections connected at their lateral edges, and a single separa'blejoint connecting the meeting edges ofone pair of sections, whereby when the joint is "broken the said meeting edges may over.- la to permit the collapsing of. the strncture. iQA 'collapsible concrete formnnlt con-5',

'sisting; of; a plum ity j of metallic sectionsgif 15 means'carried by the sidQbf each seetion for connecting with the side of an adjacent section; a -releasable, jomt' formed between the lateraledges of certain ofsaid sections, means atthe end of-each section for connecting the entire form unit withpan adjacent form unit, and-means forconnectmg the central portion ofthe end of one section with an adjacent section consisting of a.

chord plate carried by each end of'the sec tion, an anchor plate carried said chord plate, and braces connected w1t plate of one section and also with the ancho'riplat'e of an adjoining section to therebrace the jointtherebetween.

the anchor g n I 1,298,941

8. A collapsible form unit for concrete and achord plate secured to the segmental structures consisting of a plurality of matchangle members at each end of the section. ing and interchangeable sections, each sec-' In testimony whereof we hereunto afix tion having a segmental angle bar'reinforceour signatures in the presence of two wit- 5 ment at each end thereof, angle bars carried nesses.

by each side thereof for reinforcingthe sec- SAMUEL JAMES HARRY. 'tion and provided with openings for re- 7 WILLIAM EDWARD KELLY.

ceiving fastenings for coupling with an ;\d Witnesses: c

jacent section, an intermediate longitudi- G.. B. FREED, Y

16 nally disposed reinforcing angle member, I J. B. Kmu'z. 

